The 1990 season

Super Typhoon Flo (1990)

Super Typhoon Flo reached Category 5 in the Western Pacific between September 8, 1990 and September 22, 1990, with a lowest pressure of 890 mb, and made landfall.

Track and intensity

The whole track of Super Typhoon Flo, colored by strength, with the other storms of the 1990 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.

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The storm

Basin
Western Pacific
Dates
September 8, 1990 to September 22, 1990
Peak strength
Category 5, 145 kt (167 mph)
Lowest pressure
890 mb (26.28 inHg)
Landfall
Yes
Accumulated cyclone energy
25.9
Fastest the center moved
40 kt (46 mph)
Identifier
WP201990

Deaths and damage

No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.

Track

Time (UTC)PositionWindPressureStatus
Sep 8, 00:005.5N 170.5E15 ktNot reported
Sep 8, 06:006.1N 168.5E15 ktNot reported
Sep 8, 12:006.8N 166.6E15 ktNot reported
Sep 8, 18:007.5N 164.8E15 ktNot reported
Sep 9, 00:008.0N 163.0E15 ktNot reported
Sep 9, 06:008.2N 162.0E15 ktNot reported
Sep 9, 12:008.4N 161.2E15 ktNot reported
Sep 9, 18:008.7N 160.2E15 ktNot reported
Sep 10, 00:009.0N 159.1E15 ktNot reported
Sep 10, 06:009.2N 158.0E15 ktNot reported
Sep 10, 12:009.3N 156.8E15 ktNot reported
Sep 10, 18:009.3N 155.6E15 ktNot reported
Sep 11, 00:009.3N 154.4E15 ktNot reported
Sep 11, 06:009.4N 153.2E15 ktNot reported
Sep 11, 12:009.6N 151.8E15 ktNot reported
Sep 11, 18:009.9N 150.4E20 ktNot reported
Sep 12, 00:0010.5N 149.1E20 kt1004 mbTropical storm
Sep 12, 06:0011.4N 147.9E20 kt1002 mbTropical storm
Sep 12, 12:0012.5N 147.1E25 kt1002 mbTropical storm
Sep 12, 18:0013.6N 146.1E25 kt1000 mbTropical storm
Sep 13, 00:0014.5N 144.7E25 kt998 mbTropical storm
Sep 13, 06:0015.1N 143.3E30 kt996 mbTropical storm
Sep 13, 12:0015.6N 142.2E35 kt996 mbTropical storm
Sep 13, 18:0016.3N 141.1E40 kt994 mbTropical storm
Sep 14, 00:0017.1N 140.0E45 kt990 mbTropical storm
Sep 14, 06:0018.0N 138.9E50 kt985 mbTropical storm
Sep 14, 12:0018.8N 137.7E55 kt980 mbTropical storm
Sep 14, 18:0019.5N 136.5E60 kt975 mbTropical storm
Sep 15, 00:0020.2N 135.4E65 kt970 mbTropical storm
Sep 15, 06:0020.9N 134.4E70 kt965 mbTropical storm
Sep 15, 12:0021.6N 133.4E75 kt960 mbTropical storm
Sep 15, 18:0022.2N 132.4E85 kt950 mbTropical storm
Sep 16, 00:0022.8N 131.5E100 kt935 mbTropical storm
Sep 16, 06:0023.3N 130.7E115 kt920 mbTropical storm
Sep 16, 12:0023.7N 130.0E130 kt905 mbTropical storm
Sep 16, 18:0024.2N 129.5E135 kt895 mbTropical storm
Sep 17, 00:0024.8N 129.1E135 kt890 mbTropical storm
Sep 17, 06:0025.6N 128.9E145 kt890 mbTropical storm
Sep 17, 12:0026.2N 129.0E145 kt895 mbTropical storm
Sep 17, 18:0026.8N 129.2E135 kt900 mbTropical storm
Sep 18, 00:0027.5N 129.6E125 kt905 mbTropical storm
Sep 18, 06:0028.4N 130.2E115 kt915 mbTropical storm
Sep 18, 12:0029.4N 131.0E110 kt920 mbTropical storm
Sep 18, 18:0030.4N 131.8E105 kt925 mbTropical storm
Sep 19, 00:0031.3N 132.7E95 kt935 mbTropical storm
Sep 19, 06:0032.5N 134.1E90 kt940 mbTropical storm
Sep 19, 12:0034.0N 135.8E85 kt950 mbTropical storm
Sep 19, 18:0036.1N 137.4E65 kt980 mbTropical storm
Sep 20, 00:0038.6N 140.0E55 kt984 mbTropical storm
Sep 20, 06:0040.3N 144.0E50 kt992 mbMixed
Sep 20, 12:0041.7N 148.4E45 kt988 mbExtratropical
Sep 20, 18:0042.9N 152.9E45 kt988 mbExtratropical
Sep 21, 00:0044.0N 157.8E50 kt984 mbExtratropical
Sep 21, 06:0045.3N 163.1E50 kt984 mbExtratropical
Sep 21, 12:0046.4N 167.8E50 kt980 mbExtratropical
Sep 21, 18:0047.3N 172.8E50 kt980 mbExtratropical
Sep 22, 00:0048.0N 178.0E50 kt976 mbExtratropical
Sep 22, 06:0048.0N 181.0EExtratropical

Other Western Pacific storms of 1990

What this means

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Sources

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.